Flight number record
DL 1854
Delta Air Lines · San Juan to New York
- Route
- SJU → JFK
- Departs
- 07:00
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1854, check with Delta Air Lines.
DL 1854 earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 15 points better than the national rate of 77.3%. When something does go wrong the average delay runs an hour and a half. That rests on 365 flights, with a median arrival 12 minutes early.
Set against the rest of the country, DL 1854's record is 15 points better than the US average of 77.3%. That gap is worth roughly 152 fewer late arrivals for every thousand flights.
Key figures
On time
92.5%
Arrivals under 15 minutes late, of 359 completed flights
Avg delay
94 min
Across delayed arrivals only, not all flights
Cancelled
1.64%
National rate is 1.89%
1 hour+ late
2.2%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. The median arrival is 12 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Schedule
When DL 1854 flies
DL 1854 flies SJU to JFK without a single fixed slot. Its most common scheduled departure was 07:00, used on 183 of 365 flights, with 07:05 (61 flights) and 07:15 (53 flights) next.
- Departs 07:00183 flights50.1%
- Departs 07:0561 flights16.7%
- Departs 07:1553 flights14.5%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 07:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 1854 runs 3 points better at 92.5%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
DL 1854 next to SJU to JFK
Every carrier on SJU to JFK combined arrived on time 77.8% of the time across 3,560 flights, so DL 1854 is 15 points ahead of it. Delta flew 1,104 flights on the same city pair under all its flight numbers, including this one, and those ran 87.7% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 11 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1854 | 365 | 92.5% | 94 min | 1.64% | A |
| All Delta Air Lines on SJU–JFK | 1,104 | 87.7% | 76 min | 2.36% | A |
| All carriers on SJU–JFK | 3,560 | 77.8% | 82 min | 3.93% | B− |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1854 quarter by quarter
DL 1854 did not run the same all year. Its best quarter was Oct–Dec 2025 at 98.9% on time and its weakest Jul–Sep 2026 at 79.7%, a swing of 19 points on roughly 73 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202530 flights93.3%
- Oct–Dec 202592 flights98.9%
- Jan–Mar 202690 flights89.7%
- Apr–Jun 202691 flights96.7%
- Jul–Sep 202662 flights79.7%
Scale runs 70% to 100%.
By weekday, DL 1854 did best on Friday at 100.0% on time and worst on Saturday at 86.3%. Each day rests on about 52 flights, so a gap of 14 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1854 runs when it is late
DL 1854 often beats the schedule: 146 of 359 completed flights, 41%, arrived 15 minutes or more early. The 27 late arrivals split 13 under half an hour, 6 between 30 and 60 minutes, and 8 an hour or more.
- 15+ min early146 flights40.7%
- Within 15 min186 flights51.8%
- 15–29 min late13 flights3.6%
- 30–59 min late6 flights1.7%
- 1–2 hours late0 flights0.0%
- 2+ hours late8 flights2.2%
Scale runs 0% to 100%.
Share of 359 completed flights by arrival against schedule.
3 of 20 late departures made up the time and arrived on time, 15% of them. 10 flights left on time and still arrived late.
The worst days
Worst days for DL 1854
The latest arrival of the period was on 31 January 2026, 6 hours 7 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 31 January 2026 | 6 hours 7 minutes | Carrier |
| 9 August 2026 | 6 hours | Carrier |
| 26 August 2026 | 5 hours 37 minutes | Carrier |
| 16 July 2026 | 4 hours 51 minutes | Late-arriving aircraft |
| 21 September 2025 | 3 hours 47 minutes | Carrier |
Delay causes
Why DL 1854 runs late
Carrier accounts for 71% of the 2,542 delay minutes carriers reported here, and the remaining four split what is left.
- 71%Carrier
- 11%Late-arriving aircraft
- 11%National Airspace System
- 7%Extreme weather
The largest share of delay minutes, 71%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,797 of the 2,542 delay minutes reported here. The split is drawn from 2,542 delay minutes reported on DL 1854.
Cancellations sit at 1.64% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 2.2% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
At 1,598 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
Every one of the 365 flights under DL 1854 in the data flew SJU to JFK. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 365 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking DL 1854
For a booking, read DL 1854 as 92.5% on time with 1.64% cancelled over 365 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SJU to JFK, every carrier and departure
- JFK to SJU, the return direction
- JetBlue Airways 1604 on the same route79.9%
- JetBlue Airways 904 on the same route77.7%
- Delta Air Lines 1961 on the same route87.7%
- Delta Air Lines 1966 on the same route83.6%
- JetBlue Airways 1004 on the same route64.2%
- Luis Munoz Marin International (SJU) delay statistics
- John F. Kennedy International (JFK) delay statistics
- Delta Air Lines on-time record
- Every Delta Air Lines flight number with a record
- The most and least reliable flight numbers in the US
- Worst months to fly in the US, ranked by the data
A flight number here means Delta Air Lines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.